/* ─── Vercel-style Design Tokens ─── */
:root {
  /* Fonts — Geist family */
  --font-body: 'Geist', -apple-system, 'Segoe UI', sans-serif;
  --font-mono: 'Geist Mono', 'SF Mono', 'Fira Code', monospace;
  --font-sidebar: 'Geist', -apple-system, 'Segoe UI', sans-serif;

  /* Font weights — adjustable globally */
  --fw-normal: 400;
  --fw-medium: 500;
  --fw-bold: 600;

  /* Font sizes — slightly larger, more readable */
  --text-base: 13px;
  --text-xs: 11px;
  --text-sm: 12px;
  --text-md: 14px;
  --text-lg: 16px;
  --text-h1: 20px;
  --text-breadcrumb: 13px;

  /* Sidebar */
  --sidebar-width: 220px;
  --sidebar-collapsed-width: 52px;
  --sidebar-bg: #FAFAFA;
  --sidebar-logo-size: 24px;
  --sidebar-nav-font-size: 13px;
  --sidebar-section-font-size: 11px;
  --color-nav-active: #F0F0F0;
  --icon-stroke: 1.5;

  /* Page layout — generous spacing */
  --page-padding-x: 18px;
  --page-padding-bottom: 24px;
  --page-header-height: 40px;
  --page-header-gap: 4px;
  --page-toolbar-gap: 13px;

  /* Colors – surface (Vercel: very clean whites/grays) */
  --color-bg: #FAFAFA;
  --color-surface: #FFFFFF;
  --color-border: #EAEAEA;
  --color-border-light: #F5F5F5;

  /* Colors – text (Vercel: #000, #666, #888, #999) */
  --color-text: #000;
  --color-text-secondary: #666;
  --color-text-muted: #888;
  --color-text-faint: #D4D4D4;
  --color-text-badge: #666;

  /* Colors – status */
  --color-green: #50E3C2;
  --color-red: #E00;
  --color-yellow: #F5A623;
  --color-blue: #0070F3;
  --color-gray: #999;

  /* Radii — rounder, Vercel-style */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-xl: 12px;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
}

/* ─── Reset ─── */
* { margin: 0; padding: 0; box-sizing: border-box; }

/* ─── Font loading ─── */
html.fonts-loading body { opacity: 0; }

/* ─── Body ─── */
@keyframes page-fade-in {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}
body {
  font-family: var(--font-body);
  font-weight: var(--fw-normal);
  background: var(--color-bg);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
  font-size: var(--text-base);
  display: flex;
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.5;
}
html { overflow-x: hidden; }

/* ─── Sidebar ─── */
.sidebar {
  width: var(--sidebar-width);
  background: var(--sidebar-bg);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  bottom: 0;
  overflow: hidden;
  transition: width 0.2s ease;
}
.sidebar-logo {
  padding: 16px 16px 12px;
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  margin-top: auto;
  transition: padding 0.2s ease, gap 0.2s ease;
}
.sidebar-logo svg { width: var(--sidebar-logo-size); height: auto; flex-shrink: 0; }
.sidebar-logo svg path { fill: var(--color-text); }
.sidebar-logo span {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: var(--fw-bold);
  letter-spacing: -0.02em;
  white-space: nowrap;
  overflow: hidden;
}
.sidebar-nav { padding: 12px 8px; flex: 1; }
.nav-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: var(--sidebar-nav-font-size);
  font-family: var(--font-sidebar);
  font-weight: var(--fw-normal);
  cursor: pointer;
  margin-bottom: 2px;
  white-space: nowrap;
  overflow: hidden;
  transition: background 0.15s, color 0.15s, padding 0.2s ease, gap 0.2s ease;
}
.nav-item:hover { background: var(--color-border); color: var(--color-text); }
.nav-item.active { background: var(--color-border); color: var(--color-text); font-weight: var(--fw-medium); }
.nav-item svg { width: 16px; height: 16px; flex-shrink: 0; fill: currentColor; }
.nav-item .badge { margin-left: auto; background: var(--color-border); padding: 1px 6px; border-radius: 10px; font-size: var(--text-xs); color: var(--color-text-secondary); }
.nav-section {
  padding: 16px 10px 4px;
  font-size: var(--sidebar-section-font-size);
  font-weight: var(--fw-medium);
  color: var(--color-text-muted);
  text-transform: none;
  letter-spacing: 0;
  font-family: var(--font-sidebar);
  white-space: nowrap;
  overflow: hidden;
}
.sidebar-footer { display: none; }

/* ─── Sidebar Collapsed ─── */
.sidebar.collapsed { width: var(--sidebar-collapsed-width); }
.sidebar.collapsed .sidebar-logo span { opacity: 0; max-width: 0; }
.sidebar.collapsed .sidebar-logo { gap: 0; padding-left: 0; padding-right: 0; justify-content: center; }
.sidebar.collapsed .sidebar-nav { padding: 12px 4px; }
.sidebar.collapsed .nav-item { font-size: 0; gap: 0; justify-content: center; padding: 6px 0; }
.sidebar.collapsed .nav-item .badge { display: none; }
.sidebar.collapsed .nav-section { display: none; }
.sidebar.collapsed ~ .main { margin-left: var(--sidebar-collapsed-width); }

/* ─── Main Layout ─── */
.main { margin-left: var(--sidebar-width); flex: 1; padding: var(--space-md) var(--page-padding-x) var(--page-padding-bottom); min-width: 0; animation: page-fade-in 0.3s ease both; transition: margin-left 0.2s ease; }
.page-header {
  display: flex; align-items: center; justify-content: space-between;
  height: var(--page-header-height);
  margin-bottom: var(--page-header-gap);
}
.page-header h1 { font-size: var(--text-h1); font-weight: var(--fw-bold); letter-spacing: -0.02em; }

/* ─── Toolbar ─── */
.toolbar { display: flex; align-items: center; gap: var(--space-sm); margin-bottom: var(--page-toolbar-gap); }
.toolbar-right { margin-left: auto; display: flex; gap: 8px; align-items: center; }
.search-input {
  padding: 7px 12px 7px 32px;
  border: 1px solid transparent;
  border-radius: 0;
  font-size: var(--text-sm);
  font-family: var(--font-body);
  outline: none;
  width: 240px;
  color: var(--color-text);
  background: transparent url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' fill='none' stroke='%23999' stroke-width='1.5'%3E%3Ccircle cx='6' cy='6' r='4.5'/%3E%3Cline x1='9.5' y1='9.5' x2='13' y2='13'/%3E%3C/svg%3E") 10px center no-repeat;
  transition: border-color 0.15s, background-color 0.15s;
}
.search-input:hover { background-color: var(--color-bg); }
.search-input:focus { border-bottom-color: var(--color-text); box-shadow: none; background-color: transparent; }
.filter-select {
  padding: 7px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-family: var(--font-body);
  background: var(--color-surface);
  color: var(--color-text-secondary);
  cursor: pointer;
  outline: none;
  transition: border-color 0.15s;
}
.filter-select:focus { border-color: var(--color-text); }

/* ─── Buttons (Vercel style) ─── */
.btn-sm {
  padding: 0 12px;
  height: 32px;
  background: var(--color-text);
  color: var(--color-surface);
  border: 1px solid var(--color-text);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--fw-medium);
  cursor: pointer;
  transition: background 0.15s, box-shadow 0.15s;
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
}
.btn-sm:hover { opacity: 0.85; }
.btn-outline {
  padding: 0 12px;
  height: 32px;
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--fw-normal);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
  display: inline-flex;
  align-items: center;
}
.btn-outline:hover { border-color: var(--color-text); }
.btn-danger {
  padding: 0 12px;
  height: 32px;
  background: var(--color-surface);
  color: var(--color-red);
  border: 1px solid #F9D2D2;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  cursor: pointer;
  font-family: var(--font-body);
  display: inline-flex;
  align-items: center;
  transition: border-color 0.15s;
}
.btn-danger:hover { border-color: var(--color-red); }
.btn-danger-text {
  padding: 0 12px;
  height: 32px;
  background: none;
  border: none;
  color: var(--color-red);
  font-size: var(--text-sm);
  cursor: pointer;
  font-family: var(--font-body);
  display: inline-flex;
  align-items: center;
}
.btn-link {
  padding: 0 12px;
  height: 32px;
  background: none;
  border: none;
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  cursor: pointer;
  font-family: var(--font-body);
  display: inline-flex;
  align-items: center;
}
.btn-link:hover { color: var(--color-text); }
.btn-ghost {
  padding: 0 8px;
  height: 32px;
  background: none;
  border: none;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  cursor: pointer;
  font-family: var(--font-body);
  display: inline-flex;
  align-items: center;
}
.btn-ghost:hover { color: var(--color-text); }

/* ─── Tables (Vercel: clean, no outer border, subtle rows) ─── */
.table-wrap { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); overflow: hidden; }
table { width: 100%; border-collapse: collapse; }
th {
  text-align: left;
  padding: 10px var(--space-md);
  font-size: var(--text-xs);
  font-weight: var(--fw-medium);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
  cursor: default;
  user-select: none;
}
th:hover { color: var(--color-text-secondary); }
th .sort { font-size: 8px; margin-left: 2px; color: var(--color-text-faint); }
td { padding: 10px var(--space-md); border-bottom: 1px solid var(--color-border); font-size: var(--text-base); }
tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--color-bg); }
.actions-btn {
  background: none;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 4px 8px;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  cursor: pointer;
  font-family: var(--font-body);
  transition: border-color 0.15s, color 0.15s;
}
.actions-btn:hover { border-color: var(--color-border); color: var(--color-text); }

/* ─── Status Dots (Vercel: clean, slightly larger) ─── */
.dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; margin-right: 6px; }
.dot.green { background: var(--color-green); }
.dot.red { background: var(--color-red); }
.dot.yellow { background: var(--color-yellow); }
.dot.blue { background: var(--color-blue); }
.dot.gray { background: var(--color-gray); }

/* ─── Global Weight Cascade ─── */
strong, b { font-weight: var(--fw-medium); }
h1, h2, h3, h4, h5, h6 { font-weight: var(--fw-bold); }

/* ─── Typography Helpers ─── */
.mono { font-family: var(--font-mono); font-size: var(--text-sm); color: var(--color-text-secondary); }
.tag { display: inline-block; padding: 2px 8px; background: var(--color-bg); border: 1px solid var(--color-border); border-radius: 20px; font-size: var(--text-xs); color: var(--color-text-secondary); }

/* ─── Toggle (Vercel style) ─── */
.toggle {
  width: 32px;
  height: 18px;
  background: var(--color-border);
  border-radius: 9px;
  position: relative;
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.2s;
}
.toggle.on { background: var(--color-text); }
.toggle::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 14px;
  height: 14px;
  background: var(--color-surface);
  border-radius: 50%;
  transition: transform 0.2s;
  box-shadow: 0 1px 2px rgba(0,0,0,0.1);
}
.toggle.on::after { transform: translateX(14px); }
.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--color-border);
}
.toggle-row:last-child { border-bottom: none; }
.toggle-row .info { }
.toggle-row .label { font-size: var(--text-base); font-weight: var(--fw-medium); }
.toggle-row .desc { font-size: var(--text-sm); color: var(--color-text-muted); margin-top: 2px; }

/* ─── Tabs (Vercel: underline style, clean) ─── */
.tabs { display: flex; gap: 0; border-bottom: 1px solid var(--color-border); margin-bottom: var(--space-md); }
.tab {
  padding: 10px 16px;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  font-weight: 400;
  transition: color 0.15s;
}
.tab:hover { color: var(--color-text); }
.tab.active { color: var(--color-text); font-weight: var(--fw-medium); border-bottom-color: var(--color-text); }

/* ─── Sections / Cards (Vercel: subtle shadow, rounded) ─── */
.section {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: var(--space-md);
}
.section h3 {
  font-size: var(--text-sm);
  font-weight: var(--fw-bold);
  color: var(--color-text);
  text-transform: none;
  letter-spacing: 0;
  margin-bottom: var(--space-md);
}

/* ─── Forms (Vercel: taller inputs, cleaner) ─── */
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-md); margin-bottom: var(--space-md); }
.form-group { margin-bottom: var(--space-md); }
.form-group:last-child { margin-bottom: 0; }
.form-group label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--fw-medium);
  color: var(--color-text);
  margin-bottom: 6px;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  font-family: var(--font-body);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: var(--color-text); box-shadow: 0 0 0 1px var(--color-text); }
.form-group textarea { height: 64px; resize: vertical; }
.hint { font-size: var(--text-xs); color: var(--color-text-muted); margin-top: 4px; }

/* ─── Breadcrumb (Vercel: slash separator, clean) ─── */
.breadcrumb { font-size: var(--text-breadcrumb); color: var(--color-text-muted); margin-bottom: var(--space-md); display: flex; align-items: center; gap: 4px; min-height: 32px; }
.breadcrumb .btn-sm { margin-left: auto; }
.breadcrumb a { color: var(--color-text-muted); text-decoration: none; transition: color 0.15s; }
.breadcrumb a:hover { color: var(--color-text); }
.breadcrumb .sep { color: var(--color-text-muted); margin: 0 2px; font-weight: 300; }

/* ─── Drawer ─── */
.drawer {
  position: fixed;
  right: 0;
  top: 0;
  bottom: 0;
  width: 400px;
  background: var(--color-surface);
  border-left: 1px solid var(--color-border);
  padding: var(--space-xl);
  box-shadow: -8px 0 24px rgba(0,0,0,0.06);
  z-index: 10;
}
.drawer-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 24px; }
.drawer-header h2 { font-size: var(--text-lg); font-weight: var(--fw-bold); letter-spacing: -0.02em; }
.drawer-close { background: none; border: none; font-size: 18px; color: var(--color-text-muted); cursor: pointer; }
.drawer .form-group { margin-bottom: var(--space-md); }
.drawer .btn-row { display: flex; gap: var(--space-sm); margin-top: 24px; }
.drawer .btn-row .btn-sm,
.drawer .btn-row .btn-outline { flex: 1; text-align: center; justify-content: center; }

/* ─── Pagination ─── */
.pagination { display: flex; align-items: center; justify-content: space-between; padding: 12px var(--space-md); border-top: 1px solid var(--color-border); }
.pagination .info { font-size: var(--text-sm); color: var(--color-text-muted); }
.pagination .pages { display: flex; gap: 4px; }
.page-btn {
  width: 28px;
  height: 28px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  font-size: var(--text-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  font-family: var(--font-body);
  transition: border-color 0.15s;
}
.page-btn:hover { border-color: var(--color-text); }
.page-btn.active { background: var(--color-text); color: var(--color-surface); border-color: var(--color-text); }

/* ─── Bulk Bar ─── */
.bulk-bar {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 10px var(--space-md);
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}
.bulk-bar .count { font-weight: var(--fw-bold); color: var(--color-text); }

/* ─── View Toggle ─── */
.view-toggle { display: flex; border: 1px solid var(--color-border); border-radius: var(--radius-md); overflow: hidden; }
.view-toggle button {
  padding: 0 12px;
  height: 30px;
  background: var(--color-surface);
  border: none;
  font-size: var(--text-sm);
  cursor: pointer;
  color: var(--color-text-muted);
  border-right: 1px solid var(--color-border);
  font-family: var(--font-body);
  transition: background 0.15s, color 0.15s;
}
.view-toggle button:last-child { border-right: none; }
.view-toggle button.active { background: var(--color-bg); color: var(--color-text); }

/* ─── Checkbox ─── */
.checkbox { width: 14px; height: 14px; accent-color: var(--color-text); cursor: pointer; }

/* ─── Save Bar ─── */
.save-bar { display: flex; justify-content: flex-end; gap: var(--space-sm); margin-top: var(--space-lg); }

/* ─── Protocol Badge ─── */
.protocol-badge {
  display: inline-block;
  padding: 2px 6px;
  border: 1px solid var(--color-border);
  border-radius: 20px;
  font-size: 10px;
  font-family: var(--font-mono);
  color: var(--color-text-muted);
}

/* ─── Mobile Menu Toggle ─── */
.mobile-menu-btn { display: none; }
.mobile-nav-flyout { display: none; }
.sidebar-overlay { display: none; }

/* ─── Mobile ─── */
@media (max-width: 768px) {
  .mobile-menu-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    position: fixed;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 201;
    width: 44px;
    height: 44px;
    background: var(--color-text);
    color: var(--color-surface);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 12px rgba(0,0,0,0.2);
  }
  .mobile-menu-btn svg { width: 18px; height: 18px; stroke: currentColor; fill: none; stroke-width: 1.5; stroke-linecap: round; }

  .sidebar { display: none; }

  .mobile-nav-flyout {
    display: none;
    position: fixed;
    bottom: 72px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 200;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 8px;
    min-width: 200px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.1);
  }
  .mobile-nav-flyout.open { display: block; }
  .mobile-nav-flyout .nav-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--text-base);
    font-family: var(--font-sidebar);
    cursor: pointer;
    margin-bottom: 2px;
    transition: background 0.15s, color 0.15s;
  }
  .mobile-nav-flyout .nav-item:hover { background: var(--color-bg); color: var(--color-text); }
  .mobile-nav-flyout .nav-item.active { background: var(--color-border); color: var(--color-text); font-weight: var(--fw-medium); }
  .mobile-nav-flyout .nav-item svg { width: 16px; height: 16px; flex-shrink: 0; fill: currentColor; }

  .sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 199;
  }
  .sidebar-overlay.visible { display: block; }

  .main { margin-left: 0; }
  .sidebar.collapsed ~ .main { margin-left: 0; }

  .toolbar { flex-wrap: wrap; }
  .search-input { width: 100%; }
  .form-row { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .panels { grid-template-columns: 1fr; }
  .drawer { width: 100%; }
}